[keycloak-user] Make custom Mapper for a specific claim field with HTTP Service Call

[Brissat Vivien]

Hi,

I would like to add a specific claim field in the JWT Token, that take a value issued from a Service Call (HTTP POST that return a JSON result).

I saw that I can maybe specify a custom Mapper with something like : public class PersonalMapper extends AbstractOIDCProtocolMapper implements OIDCAccessTokenMapper, OIDCIDTokenMapper, UserInfoTokenMapper{}

But I don’t know where to use this code, and I don’t know where to call my Service in Keycloak.

Maybe in a custom Provider ? The documentation is not really helpful since I don’t see any SPI for Custom Mapper, or a way to achieve this.

Thanks for your help,

Best Regards

Vivien Brissat